Module org.elasticsearch.nativeaccess

Package org.elasticsearch.nativeaccess.jdk

Class PosixMappedSegment

java.lang.Object

org.elasticsearch.nativeaccess.jdk.JdkMappedSegment

org.elasticsearch.nativeaccess.jdk.PosixMappedSegment

All Implemented Interfaces:

AutoCloseable, MappedSegment

public class PosixMappedSegment
extends JdkMappedSegment

Field Summary

Fields inherited from class org.elasticsearch.nativeaccess.jdk.JdkMappedSegment

segment

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PosixMappedSegment(MemorySegment seg, Arena arena)

Method Summary

Modifier and Type	Method	Description
void	madvise(long offset, long length, int advice)	Advises the operating system about the expected access pattern for the specified memory region, allowing the kernel to optimize paging behavior.
static PosixMappedSegment	ofShared(FileChannel fileChannel, FileChannel.MapMode mode, long position, long size)
void	prefetch(long offset, long length)	Prefetches the given offset and length.
MappedSegment	slice(long index, long length)	Returns a slice of this segment.

Methods inherited from class org.elasticsearch.nativeaccess.jdk.JdkMappedSegment

close, segment

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

PosixMappedSegment

protected PosixMappedSegment(MemorySegment seg,
 Arena arena)

Method Details

ofShared

public static PosixMappedSegment ofShared(FileChannel fileChannel,
 FileChannel.MapMode mode,
 long position,
 long size)
                                   throws IOException

Throws:

IOException

slice

public MappedSegment slice(long index,
 long length)

Description copied from interface: MappedSegment

Returns a slice of this segment. Closing a slice does not close its parent.

Specified by:

slice in interface MappedSegment

Overrides:

slice in class JdkMappedSegment

prefetch

public void prefetch(long offset,
 long length)

Description copied from interface: MappedSegment

Prefetches the given offset and length.

Specified by:

prefetch in interface MappedSegment

Overrides:

prefetch in class JdkMappedSegment

madvise

public void madvise(long offset,
 long length,
 int advice)

Description copied from interface: MappedSegment

Advises the operating system about the expected access pattern for the specified memory region, allowing the kernel to optimize paging behavior.

Specified by:

madvise in interface MappedSegment

Overrides:

madvise in class JdkMappedSegment

Parameters:

offset - the starting offset within the buffer

length - the length of the region in bytes

advice - the access pattern advice; see MadviseAdvice constants